INTRODUCTION
A Natural disaster is an unforeseen occurrence of an event that causes harm to society. There are many Natural disasters that damage the environment and the people living in it. Some of them are earthquakes, cyclones, floods, Tsunami, landslides, volcanic eruption, and avalanches. Spatial extent measures the degree or severity of the disaster.
CAUSES OF NATURAL CALAMITIES
The disasters are different according to their occurrence. For example, the causes of an earthquake cannot be the same as that of forest-fire. Natural disasters are caused due to different reasons like soil erosion, seismic activity, tectonic movements, air pressure, and ocean currents etc.Natural activities taking place in the earth’s crust, as well as surface, are the main reasons for these disasters. Flooding and erosion can occur are really prone to the areas where mining, deforestation, and manufacturing have taken place.
LEVELS OF DISASTER
The severity or degree of damage can be further divided into three categories:
Small Scale Disasters: Small scale disasters are those that extend from 50 Kms. to 100 Kms. So this kind of disasters does not cause much damage.
Medium-scale disasters: Medium Scale disasters extend from 100 Kms to 500 Kms. These cause more damage than a small scale disaster. Moreover, they can cause greater damage if they occur in colonial states.
Large Scale Disasters: These disasters cover an area of more than 1000 Kms. These cause the most severe damage to the environment. Furthermore, these disasters can even take over a country if the degree is high. For instance, the wiping out of the dinosaurs was because of a large scale natural disaster.
TYPES OF DISASTER
Earthquake: An earthquake is the shaking or vibrating of the earth. An earthquake can range in sizes. As a result, some are so weak that they go unnoticed. But some are so strong that they can even destroy the whole city. Earthquakes can cause disruption of ground. Moreover, the can also cause landslides, avalanches, and Tsunami. However, the center of an earthquake falls mostly offshore.
Landslides: Landslides is the moving of big boulders of rocks or debris down a slope. As a result, landslides occur on mountains and hilly areas. Moreover, landslides can cause destruction to man-made things in many ways.
Avalanches: Avalanches are like landslides. But instead of rocks thousand tons of snow falls down the slope. Moreover, this causes extreme damage to anything that comes in its way. People who live in snowy mountains always have fear of it.
Tsunami: Tsunami is the production of very high waves in oceans and seas. Moreover, the displacement of the ground causes these high waves. A tsunami can cause floods if it occurs near shores. A Tsunami can consist of multiple waves. Moreover, these waves have a high current. Therefore it can reach coastlines within minutes. The main threat of a tsunami is if a person sees a Tsunami he cannot outrun it.
PREVENTION OF NATURAL CALAMITIES
The best that we can do is to stop the practices that are harmful to our environment and leading to environmental degradation and at the same time, we should also be prepared for a disaster with our disaster management plan. It is also required to dispose of the dead animals as well human bodies properly before an epidemic outbreak. Our environment should be saved from pollution. Stop burning plastics and save the earth. Stop cutting trees. The risk factors for increased infectious diseases transmission and outbreaks are mainly associated with the after-effects of the disasters

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